Juniors and Seniors looking to take the ACT should consider signing up soon. The last day to register to take the October ACT is on September 21. The library will offer a study session after school from the 17-20. Some ACT study sessions can cost roughly $400, so it's a smart idea to take advantage of these free sessions. The cost to take the test is $50.50 with the writing section or $35.00 without it.